<template>
  <div class="app-container">
    <switch-roles @change="handleRolesChange"/>
    <div :key="key" style="margin-top:30px;">
      <div>
        <span class="permission-alert" v-permission="['admin']">
          Only
          <el-tag class="permission-tag" size="small">admin</el-tag> can see this
        </span>
        <el-tag class="permission-sourceCode" type="info" v-permission="['admin']">v-permission="['admin']"</el-tag>
      </div>

      <div>
        <span class="permission-alert" v-permission="['editor']">
          Only
          <el-tag class="permission-tag" size="small">editor</el-tag> can see this
        </span>
        <el-tag class="permission-sourceCode" type="info" v-permission="['editor']">v-permission="['editor']"</el-tag>
      </div>

      <div>
        <span class="permission-alert" v-permission="['admin','editor']">
          Both
          <el-tag class="permission-tag" size="small">admin</el-tag> and
          <el-tag class="permission-tag" size="small">editor</el-tag> can see this
        </span>
        <el-tag class="permission-sourceCode" type="info" v-permission="['admin','editor']">
          v-permission="['admin','editor']"
        </el-tag>
      </div>
    </div>

    <div :key="'checkPermission'+key" style="margin-top:60px;">
      <code>
        {{ $t('permission.tips') }}
        <br> e.g.
      </code>

      <el-tabs style="width:550px;" type="border-card">
        <el-tab-pane label="Admin" v-if="checkPermission(['admin'])">
          Admin can see this
          <el-tag class="permission-sourceCode" type="info">v-if="checkPermission(['admin'])"</el-tag>
        </el-tab-pane>

        <el-tab-pane label="Editor" v-if="checkPermission(['editor'])">
          Editor can see this
          <el-tag class="permission-sourceCode" type="info">v-if="checkPermission(['editor'])"</el-tag>
        </el-tab-pane>

        <el-tab-pane label="Admin-OR-Editor" v-if="checkPermission(['admin','editor'])">
          Both admin or editor can see this
          <el-tag class="permission-sourceCode" type="info">v-if="checkPermission(['admin','editor'])"</el-tag>
        </el-tab-pane>
      </el-tabs>
    </div>
  </div>
</template>

<script>
  import permission from '@/directive/permission/index.js' // 权限判断指令
  import checkPermission from '@/utils/permission' // 权限判断函数
  import SwitchRoles from './components/SwitchRoles'

  export default {
    name: 'DirectivePermission',
    components: {SwitchRoles},
    directives: {permission},
    data() {
      return {
        key: 1 // 为了能每次切换权限的时候重新初始化指令
      }
    },
    methods: {
      checkPermission,
      handleRolesChange() {
        this.key++
      }
    }
  }
</script>

<style lang="scss" rel="stylesheet/scss" scoped>
  .app-container {
    /deep/ .permission-alert {
      width: 320px;
      margin-top: 15px;
      background-color: #f0f9eb;
      color: #67c23a;
      padding: 8px 16px;
      border-radius: 4px;
      display: inline-block;
    }

    /deep/ .permission-sourceCode {
      margin-left: 15px;
    }

    /deep/ .permission-tag {
      background-color: #ecf5ff;
    }
  }
</style>

